<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>model_1</title>
        <link type="text/css"  rel="stylesheet" href="css/model.css"/>

    </head>
    <body>
        <div class=" header_1 ">top</div>
        <div class="Container">
        <div class="sidebar_1">侧边栏</div>
        <div class="content_1">内容主体部分</div>
        <button>按钮</button>
        <div class="panel_1">操作面板 </div>
        </div>

</body>
</html>  